In-facepiece dust concentration is changed dozens of times in a matter of minutes due to changes of the size of the gaps between the mask and face. Source. A respirator is a device designed to protect the wearer from inhaling particulate matter, including airborne microrganisms, fumes, vapors, i.e. gases.
Why join Brainly? A community for students. Products of the neolithic culture Steel plows Boats with sails Domesticated dogs Wild figs. the answer would mostly likely be referring to things that actually were of use to the neolithic people and agriculture was the biggest thing making the answer steel plow. anonymous.
Neolithic refers to the time period roughly 7,000-10,000. BC. Well construction seems to date from the time of. the adoption of a series of behaviours common to the. people of a given region. These behaviours include the. widespread use of farming, the keeping of domestic. animals, and the use of metal (copper) tools.